Stovepipe jointing means



Oct. 19, 1937. KAY 2,096,519

STOVEPIPE JOINTING' MEANS Filed Dec. 29, 1956 4 2 Sheets-Sheet 1 Inventor Attorneys Oct. 19, 1937. v KAY 2,096,519

STOVEPIPE JOINTING MEANS Filed Dec. 29, 1936 2 sheets-sheet-z firfur ay I F 35 5, 3. v

1 Hornqus Patented Oct. 19, 1937 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to a novel joint structure susceptible of being made as an integral part of pipe-lengths, elbows, and the like, and the purpose of the invention is to provide a safe and reliable joint to facilitate assembling a smokestack.

Briefly, the preferred embodiment of the invention is characterized by what may be briefly called a split collar associated with a projecting crimped nipple, whereby to provide an effective sheath for reception of the adjacent end of a companion pipe-length, said collar being so constructed as to accommodate a quick applicable and removable fastener designed to effectively clamp the collar in a reliable embracing manner around the adjacent pipe-ends.

More specifically, the novelty has to do with a pipe-end formation, wherein the crimped or corrugated end of the pipe is bent back upon itself, and then outwardly to define a split annular clamping collar, the free ends of the collar being formed with hooks to cooperate with interlocking hooks on a retention clip.

Other features and advantages will become more readily apparent from the following description and drawings.

In the drawings:

Figure l is an elevational view of a stovepipe embodying jointing means constructed in accordance-with the principles of the present invention.

Figure 2 is a longitudinal sectional new taken approximately on the plane of the line 2-2 of Figure 1.

Figure 3 is an end view of Figure 1 with the sheath-forming collar in contracted clamping or retaining position.

Figure 4 is a view showing how the invention may be incorporated in two or more stovepipe sections.

Figure 5 is a view calculated to show how the same joint or collar arrangement may be incorporated in an elbow.

It is obvious that the principle of the invention is the same whether it is used on a straight length of pipe or an elbow, and therefore like numerals are employed to designate like parts throughout the five views.

The body of the pipe is denoted by the numeral 6 and it is shown as provided with a longitudinal seam as at l. The joint-forming end of the pipe is crimped or corrugated as at B, and is then bent back upon itself as indicated at 9 forming a double ply of metal. The outer ply, as shown in Figure 2, is conveniently distinguished by the numeral I 0. This feature I!) is of appropriate length and the free end portion thereof is bent upon itself, as indicated at II, into what may be called a return bend, and this defines a substantially annular, non-corrugated, or plain 5 clamping collar. To consider the arrangement otherwise, the corrugated features 8 and It in conjunction with the collar form a sheath for slidable reception of the complemental end of the companion pipe section l3, as depicted in Fig- 10 ure 2. It will be observed that the free transverse ends of the collar l2 are slit in line with the seam 1, and these free ends are bent outwardly upon themselves to provide retaining hooks M for reception of companion hooks on the 1ongi 15 tudinal edge portions of the fastening clip Hi. This clip is in the nature of a simple plate having channel-shaped longitudinal edges forming the hooks I5 and provided with a finger piece I 1. Thus, by slipping the end of the pipe section I3 20 into the sheath made up of the bent-back ply l0 and the collar I2, it is obvious that the collar will expand radially to accommodate said pipe end. Then the clip i8 is placed in position and the interlocking hooks l5 and I4 cooperate in tight- 5 ening the collar firmly around the pipe section l3 to eifect the desired clamped telescoping joint connection.

As shown in Figure 2, the bend 9 does not bridge the seam. In other words, the metal is cut out 30 to return the bend l I on opposite sides of the longitudinal seam so as to have one seam as shown at l on Figure 3.

It is further noted that the inner and outer corrugated features 8 and in form what may be 5 called a crimped-nipple, and this extends beyond the collar, whereby to provide the desired pilot feature to facilitate joining the two pipe sections 6 and I3. Or to state the matter otherwise, the collar I2 is approximately one half the length of the corrugated or crimped nipple. Hence, the pipe section I3 can be slipped well on to the nipple and into the collar to provide a smokeproof joint. As a matter of fact, so secure and reliable is the joint that it is capable of avoiding sagging of smokestack, as is so common with the present day fragile and unreliable joint. Not only this, a joint of the type under consideration is usable in connection with chimney connections between gas burners and converter units and eliminates the hazard of escaping monoxide gas.

It is thought that the description taken in connection with the drawings will enable a clear understanding of the invention to be had.

Therefore, a more lengthy description is thought unnecessary.

While the preferred embodiment of the invention has been shown and described, it is to be understood that minor changes coming within the field of invention claimed may be resorted to if desired.

I claim:

The herein described pipe jointing means comprising essentially-alpipe section having allongitudinal seam and also having outwardly beyond said seam a diametrically reduced, longitudinally split portion, said portion being longitudinally collar said clip being slidableon. andnoff the unreduced portion'of the pipe section and having a finger hold at its rear end.

* ARTHUR KAY. 

